/*
 * Galaxium Messenger
 * 
 * Copyright (C) 2008 Philippe Durand <draekz@gmail.com>
 * 
 * License: GNU General Public License (GPL)
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

using System;
using System.IO;
using System.Xml;
using System.Text;
using System.Security.Cryptography;

using Galaxium.Core;

namespace Galaxium.Protocol.GaduGadu
{
	public class GaduDisplayImage : IDisplayImage
	{
	//	private ISession _session;
		private byte[] _imageBuffer;
		private string _filename = string.Empty;
		private string _checksum = string.Empty;
		
		public GaduDisplayImage(ISession session)
		{
	//		_session = session;
		}
		
		public byte[] ImageBuffer
		{
			get { return _imageBuffer; }
			set
			{
				_imageBuffer = value;
				CreateChecksum ();
			}
		}
		
		public string Filename
		{
			get { return _filename; }
			set
			{
				_filename = value;
				
				if (File.Exists(_filename))
					_imageBuffer = File.ReadAllBytes(_filename);
			}
		}
		
		public string Checksum
		{
			get
			{
				return _checksum;
			}
			set { _checksum = value; }
		}
		
		private void CreateChecksum ()
		{
			HashAlgorithm hash = new SHA1Managed();
			byte[] hashBytes = hash.ComputeHash(ImageBuffer);
			
			_checksum = BaseUtility.BytesToString (hashBytes);
		}
	}
}